DROP TABLE #stories
CREATE TABLE #stories (id int, source varchar(7),title varchar(8),storydate datetime)
INSERT INTO #stories VALUES (10,'cnn','Story 10','1/21/2010')
INSERT INTO #stories VALUES (9,'bbcnews','Story 9','1/20/2010')
INSERT INTO #stories VALUES (8,'bbcnews','Story 8','1/19/2010')
INSERT INTO #stories VALUES (7,'skynews','Story 7','1/18/2010')
INSERT INTO #stories VALUES (6,'cnn','Story 6','1/17/2010')
INSERT INTO #stories VALUES (5,'bbcnews','Story 5','1/16/2010')
INSERT INTO #stories VALUES (4,'cnn','Story 4','1/15/2010')
INSERT INTO #stories VALUES (3,'skynews','Story 3','1/14/2010')
INSERT INTO #stories VALUES (2,'skynews','Story 2','1/13/2010')
INSERT INTO #stories VALUES (1,'cnn','Story 1','1/12/2010')

SELECT DISTINCT
s.source,
s.title,
s.storydate
FROM #stories s
WHERE s.storydate IN (SELECT TOP 2 s2.storydate FROM #stories s2 WHERE s2.source=s.source)
ORDER BY source, storydate desc


reference found here http://dev.mysql.com/doc/refman/5.1/en/correlated-subqueries.html

Note that we’re using WHERE IN (subquery) because we want to return more than one date on the inner resultset.

Hope that helps!

Jon Crawford